sf: Update PowerAdvisor to talk to AIDL Power HAL

Updates the PowerAdvisor to talk to the AIDL Power HAL, and hooks up
the new DISPLAY_UPDATE_IMMINENT Boost present in that HAL.

Test: libsurfaceflinger_unittest
Test: libcompositionengine_test
Test: Manual with ALOGV
Bug: 132390048
Bug: 146453294
Change-Id: I3cb3e8d04303373de24b6dc150ce724aac89407c